Year: 2026

Sequential spark ignition

PG-07 controls the combustion process through sequential spark ignition. By driving

the smart coils, the system ignites the air-fuel mixture with precision timing

for optimal combustion, thus improving fuel efficiency. The rapid, high pressure,

more complete combustion yields an increase in torque and a decrease in

hydrocarbon emissions.

LPG and natural gas engines

An inline Woodward L-Series fuel trim valve controls fuel delivery based on a PWM

signal from the ECU.

The position of the trim valve biases the output pressure of the fuel flowing from

the regulator. The feedback voltage from the oxygen sensor determines

if the fuel delivery needs to be increased or decreased.

Sophisticated software modeling maintains optimum performance and response

throughout the life of the engine.

DESCRIPTION

PG-07 delivers precise and fully integrated control of fixed-speed, stationary industrial

engines.

Using proven, reliable components of Woodward’s MI-04 closed-loop control

system and the L-Series electronic throttle, PG-07 monitors and regulates

functions of the following engine subsystems.

Fuel Delivery

LPG, natural gas or gasoline

Spark-Ignition

Smart coils

Air

Electronic throttle

PG-07 commands full authority over spark, fuel, and air. This integrated approach

permits precise governing and air/fuel ratio control while remaining flexible enough

to handle transients. The control algorithms are model-based, feed forward,

adaptive strategies. Continual updates to the adaptive parameters allow

for more responsive control.

SYSTEM OVERVIEW

Components on LPG & NG Engines

 Electronic control module

 Electric fuel lock off solenoid valve

 Fuel pressure regulator*

 Fuel trim valve

 Fixed venturi mixer assembly

 Electronic throttle assembly

 Oxygen sensor

 Integrated temperature and manifold pressure sensor

 Smart coil

Components on Gasoline Engines

 Electronic control module and related sensors

 Fuel rail

 Fuel pressure regulator

 Fuel injectors

 Smart coil

(*) Two-stage pressure regulator/vaporizer on LPG liquid fuel systems

APPLICATIONS

Woodward’s PG-07 control system controls engines in generator sets, pumps,

and other stationary industrial equipment.It controls spark-ignited engines fueled by

LPG (vapor or liquid), natural gas and/or gasoline. Suitable for engines ranging in

size from 25 HP to 250 HP (1.0L to 8.1L). The highly accurate, closed-loop control

system helps OEMs and packagers comply with local emission standards

while providing discerning customers with advanced capability for remote monitoring

and control to reduce fuel consumption and increase engine life.

PG-07 provides accurate and reliable performance control over the service life

of the engine in the extreme operating environments typical of heavy-duty,

stationary industrial applications.

Optional Features

An oil cooler is recommended when governor oil temperature exceeds 99 °C (210 °F) or

governor drive shaft speed exceeds 1200 rpm on diesel or gas engines,

or 1100 rpm on steam turbines.

Air, oil, or water shutdown devices, either high or low pressure, are available for

engine protection. An energize or de-energize solenoid shutdown device is also

available.

For quick starts, a booster servomotor is available to supply immediate oil pressure

to the governor. This conserves engine starting air.

Preloaded buffer springs are available for governors used on gas engines and on

some engines driving reciprocating pumps.

Various base and power cylinder assemblies are available to conform to engine or

turbine manufacturer’s specifications.

Power servos may be mounted integrally on the governor with the terminal shaft in

either the 3. 6. 9. or 12 o’clock positions. Power servos also may be mounted

remotely from the governor. However, rotary power servos mount vertically only.

Applications

The PG-PL Governor is widely used for controlling speed for all types of diesel or gas

engines and steam turbines, driving pumps and compressors.

Standard Features

An internal oil pump, relief-valve, and accumulator system controls governor

operating pressure. A self-contained sump stores oil and reduces contamination from

outside sources.

Oil flow to and from the governor cylinder assembly is controlled by a centrifugal

flyweight-head and pilot-valve assembly. A power cylinder (servomotor) positions

the fuel racks, fuel valve, or steam valve of the engine or turbine.

A pneumatic (direct or reverse) operated bellows-type mechanism sets governor speed.

A knob on the governor provides a means of manual speed adjustment.

Governor stability is provided by an adjustable needle valve and spring-loaded

buffer compensation system.

We provide high-performing air valves and air- metering technologies

across the turbine engine environment. Turbine engine actuation,

position sensing and servo systems provide highly reliable and cost-effective solutions.

Canted shaft designs leverage decades of experience for reliable operation

in harsh environments, including extremely high temperatures (>1450°F)

and severe exhaust contamination.

Features & Benefits Highlights

• Air management and engine-oil solutions based on decades of technological leadership

• Air-management systems that operate in extreme conditions,

including extremely high temps (>1.450°F)

• Broad application expertise to meet difficult requirements

• Highly reliable and cost-effective solutions delivered within severely condensed program schedules

• A CFD led approach yields significant system level cost and weight savings

without violating stringent envelope constraints

• Innovative flow body designs to meet Class IV “bubble tight” sealing per

ANSI/FCI 70-2 over life in extreme environments (equates to 0.01% of rated flow)

• Leverage of industry leading actuation and servo valve innovations that significantly

reduce LRU and System envelopes while simultaneously improving reliability

• Fuel-powered and electromechanical actuation, which provides double digit reliability improvements

Our actuation solutions meet the highest aviation performance standards.

We provide complete system design, analysis and testing across a wide

range of turbine engine applications. A fully optimized and validated

suite of hardware enables flawless entry into service (EIS) invariable

geometry, thermal management, turbine clearance control,

engine operability and compressor bleed applications.

Features & Benefits Highlights

• World-class suite of technologies, including fueldraulic actuators,

electro-mechanical actuators, air valves, specialty valves, servo controls,

and position sensors

• Systems-level performance and accuracy stacks that include sensor

effects over life and signal demodulation errors

• Optimal architectures and actuator placement based on your specific requirements

Our fuel injection and ignition solutions meet OEM emissions requirements,

while enabling optimal engine operation and performance.

A range of designs precisely place atomized fuel for efficient and complete combustion.

Our valve, fuel control and ignition technologies can be combined for combustion

solutions that improve liftoff at higher altitudes and difficult windmilling conditions.

Our SmartFire Ignition System combines atomization with ignition to meet the

most demanding customer requirements.

Features & Benefits Highlights

• Fuel nozzle designs range from high performance pressure atomizing and

air-blast tips to multi-circuit direct injection designs

• High- and low-tension ignition systems with solid-state exciters,

long-life Igniters and sealed ignition leads

• Extensive range of certified parts for aerospace industry applications

produced to specifications through advanced additive manufacturing

• Fuel control and ignition technologies can be combined for optimal

combustion solutions

From aircraft fuel inlet to tightly controlled combustion, our fuel pumping

and metering systems set the highest standards in pressurization and

control with reliability and low fuel burn. Our servo valves and industry-leading

technologies provide elegant, cost-effective solutions for high performance

and reliability in harsh environments.

Features & Benefits Highlights

• Minimize program risks and increase reliability with our industry-leading

performance and technological leadership based on millions of flight hours

• Dedicated analysis team facilitates system level tradeoffs between critical

mission requirements, such as pump heat rejection, metering accuracy,

disturbance rejection, weight and cost

• On-site engineering support ensures a flawless Entry Into Service (EIS)

for new or replacement applications

• Cost savings over the product lifecycle of any turbine-based system

• Scalable component platforms reduce risk, cut development costs and boost reliability